Update doesn't appear on App Store

I had a brand new Macbook Pro and i update OS High Sierra to version 10.13.1 .

I try to update to 10.13.4 but doesn't appear on App Store the new update.

I try to use terminal command "sudo software update -ia" but says there are no updates available. When i open about this mac they say im in version 10.13.1.

Any solution for this?